Photoluminescence characterization and energy transfer of NaBa1-x-yPO4：xCe3＋, yTb3＋ phosphors

A series of NaBa1-x-yPO4：xCe3＋, yTb3＋ phosphors were synthesized by solid-state reaction method. The crystal structure, photolu- minescence emission and excitation spectra and decay times of the phosphors were carefully investigated. The results revealed that an effi- cient energy transfer occurred from Ce3＋ to Zb3＋ ions in NaBaPO4 host by means of dipole-dipole interactions and the critical distance of the energy transfer was about 0.638 nm. Moreover, the phosphor emitted strong green emission under UV excitation, indicating that the phos- phors are potentially useful as a highly efficient, green-emitting phosphor.